Financing Arrangements - Interest Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 02, 2014	Feb. 20, 2014
Short-Term Debt [Line Items]
Direct Interest Expense	$ 351		$ 222	$ 158
Amortization of Deferred Financing Costs and Discount / Premium	$ 14		9	12
Total Interest Expense		$ 365	231	170
Average outstanding	3.72%	3.45%
Debt instrument, interest rate, effective percentage	4.78%	3.04%
4.750% Notes due 2022 | Unsecured Notes
Short-Term Debt [Line Items]
Direct Interest Expense	$ 6		21	21
Amortization of Deferred Financing Costs and Discount / Premium	0		1	0
Total Interest Expense		$ 6	22	21
5.000% Notes due 2022 | Unsecured Notes
Short-Term Debt [Line Items]
Direct Interest Expense	0		11	12
Amortization of Deferred Financing Costs and Discount / Premium	0		0	0
Total Interest Expense		0	11	12
4.625% Notes due 2024 | Unsecured Notes
Short-Term Debt [Line Items]
Direct Interest Expense	19		19	19
Amortization of Deferred Financing Costs and Discount / Premium	1		1	1
Total Interest Expense		20	20	20
1.650% Notes due 2024 | Unsecured Notes
Short-Term Debt [Line Items]
Direct Interest Expense	8		2	0
Amortization of Deferred Financing Costs and Discount / Premium	2		0	0
Total Interest Expense		10	2	0
4.125% Notes due 2025 | Unsecured Notes
Short-Term Debt [Line Items]
Direct Interest Expense	19		19	19
Amortization of Deferred Financing Costs and Discount / Premium	1		2	3
Total Interest Expense		20	21	22
4.250% Notes due 2025 | Unsecured Notes
Short-Term Debt [Line Items]
Direct Interest Expense	20		11	0
Amortization of Deferred Financing Costs and Discount / Premium	(7)		(4)	0
Total Interest Expense		13	7	0
8.625% Notes due 2025 | Unsecured Notes
Short-Term Debt [Line Items]
Direct Interest Expense	22		22	15
Amortization of Deferred Financing Costs and Discount / Premium	2		1	1
Total Interest Expense		24	23	16
3.400% Notes due 2026 | Unsecured Notes
Short-Term Debt [Line Items]
Direct Interest Expense	34		35	2
Amortization of Deferred Financing Costs and Discount / Premium	5		4	0
Total Interest Expense		39	39	2
2.625% Notes due 2027 | Unsecured Notes
Short-Term Debt [Line Items]
Direct Interest Expense	11		6	0
Amortization of Deferred Financing Costs and Discount / Premium	1		0	0
Total Interest Expense		12	6	0
3.250% Notes due 2027 | Unsecured Notes
Short-Term Debt [Line Items]
Direct Interest Expense	15		0	0
Amortization of Deferred Financing Costs and Discount / Premium	2		0	0
Total Interest Expense		17	0	0
3.125% Notes due 2028 | Unsecured Notes
Short-Term Debt [Line Items]
Direct Interest Expense	23		5	0
Amortization of Deferred Financing Costs and Discount / Premium	1		0	0
Total Interest Expense		24	5	0
CLO-1 Notes | Unsecured Notes
Short-Term Debt [Line Items]
Direct Interest Expense	13		8	10
Amortization of Deferred Financing Costs and Discount / Premium	1		0	0
Total Interest Expense		14	8	10
Revolving Credit Facility | Ambler Credit Facility | Line of Credit
Short-Term Debt [Line Items]
Direct Interest Expense	6		2	0
Amortization of Deferred Financing Costs and Discount / Premium	0		0	0
Total Interest Expense		6	2	0
Revolving Credit Facility | CCT Tokyo Funding Credit Facility | Line of Credit
Short-Term Debt [Line Items]
Direct Interest Expense	11		4	6
Amortization of Deferred Financing Costs and Discount / Premium	1		1	1
Total Interest Expense		12	5	7
Revolving Credit Facility | Darby Creek Credit Facility | Line of Credit
Short-Term Debt [Line Items]
Direct Interest Expense	10		3	0
Amortization of Deferred Financing Costs and Discount / Premium	0		0	0
Total Interest Expense		10	3	0
Debt instrument, interest rate, effective percentage						0.375%
Revolving Credit Facility | Dunlap Credit Facility | Line of Credit
Short-Term Debt [Line Items]
Direct Interest Expense	19		6	0
Amortization of Deferred Financing Costs and Discount / Premium	0		0	0
Total Interest Expense		19	6	0
Debt instrument, interest rate, effective percentage					0.25%
Revolving Credit Facility | Juniata River Credit Facility | Line of Credit
Short-Term Debt [Line Items]
Direct Interest Expense	0		6	0
Amortization of Deferred Financing Costs and Discount / Premium	0		0	0
Total Interest Expense		0	6	0
Revolving Credit Facility | Locust Street Funding Credit Facility | Line of Credit
Short-Term Debt [Line Items]
Direct Interest Expense	0		0	13
Amortization of Deferred Financing Costs and Discount / Premium	0		0	3
Total Interest Expense		0	0	16
Revolving Credit Facility | Meadowbrook Run Credit Facility | Line of Credit
Short-Term Debt [Line Items]
Direct Interest Expense	9		4	0
Amortization of Deferred Financing Costs and Discount / Premium	0		0	0
Total Interest Expense		9	4	0
Revolving Credit Facility | Senior Secured Revolving Credit Facility | Line of Credit
Short-Term Debt [Line Items]
Direct Interest Expense	106		38	41
Amortization of Deferred Financing Costs and Discount / Premium	4		3	3
Total Interest Expense		110	41	44
Prime Brokerage Facility | Burholme Prime Brokerage Facility | Line of Credit
Short-Term Debt [Line Items]
Direct Interest Expense	0		0	0
Amortization of Deferred Financing Costs and Discount / Premium	$ 0		0	0
Total Interest Expense		$ 0	$ 0	$ 0